What is minimum concentration of `SO_(4)^(2-)` required to precipitate `BaSO_(4)` in solution containing `1 xx 10^(-4)` mole of `Ba^(2+)` ? (`K_(sp)` of `BaSO_(4) = 4 xx 10^(-10)`)

Options

A. `4xx10^(-10)M`
B. `2xx10^(-10)M`
C. `4xx10^(-6)M`
D. `2xx10^(-3)M`

Answer

D

Explanation

`{:(BaSO_(4)hArr,Ba^(+2)+,SO_(4)^(-2),,),(,10^(-4),X,,),(Ksp=[10^(-4)][X],,,,),(4xx10^(-10)=10xxX,,rArr x=4xx10^(-6),,):}`